This driver doesn't use sleeping operations in .brightness_set
method if can_sleep variable is not set. In that case it can be
marked with LED_BRIGHTNESS_FAST flag.
That flag allows changing brightness at high rates (over 100Hz).
CC: Bryan Wu <coolo...@gmail.com>
CC: Richard Purdie <rpur...@rpsys.net>
CC: Jacek Anaszewski <j.anaszew...@samsung.com>
CC: linux-l...@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Stas Sergeev <s...@users.sourceforge.net>
---
drivers/leds/leds-pwm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
index 1d07e3e..82d01e5 100644
--- a/drivers/leds/leds-pwm.c
+++ b/drivers/leds/leds-pwm.c
@@ -124,6 +124,8 @@ static int led_pwm_add(struct device *dev, struct
led_pwm_priv *priv,
led_data->can_sleep = pwm_can_sleep(led_data->pwm);
if (led_data->can_sleep)
INIT_WORK(&led_data->work, led_pwm_work);
+ else
+ led_data->cdev.flags |= LED_BRIGHTNESS_FAST;
led_data->period = pwm_get_period(led_data->pwm);
if (!led_data->period && (led->pwm_period_ns > 0))
--
1.7.9.5
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